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Reference for unit 'System' (#rtl)

Ord

Return ordinal value of an ordinal type.

Declaration

Source position: system.fpd line 57

function Ord(

X: TOrdinal

):LongInt;

Description

Ord returns the Ordinal value of a ordinal-type variable X.

Historical note:

Originally, Pascal did not have typecasts and ord was a necessary function in order to do certain operations on non-integer ordinal types. With the arrival of typecasting a generic approach became possible, making ord mostly obsolete. However ord is not considered deprecated and remains in wide use today.

Errors

None.

Example

Program Example45;

{ Program to demonstrate the Ord,Pred,Succ functions. }

Type
  TEnum = (Zero, One, Two, Three, Four);

Var
  X : Longint;
  Y : TEnum;

begin
  X:=125;
  Writeln (Ord(X));  { Prints 125 }
  X:=Pred(X);
  Writeln (Ord(X));  { prints 124 }
  Y:= One;
  Writeln (Ord(y));  { Prints 1 }
  Y:=Succ(Y);
  Writeln (Ord(Y));  { Prints 2}
end.

Chr		Convert byte value to character value
Succ		Return next element of ordinal type.
Pred		Return previous element for an ordinal type.
High		Return highest index of open array or enumerated
Low		Return lowest index of open array or enumerated

Ord

Declaration

Description

Errors

See also

Example